html,
body {
	width: 100%;
	height: 100%;
	margin: 0;
	padding: 0;
}

body::before {
	content: '';
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	height: 50%;
	background: white;
 scrollbar-width: none; /* firefox */
  -ms-overflow-style: none; /* IE 10+ */
  overflow-x: hidden;
  overflow-y: auto;	
}
.login-box {
	width: 100%;
	max-width: 20rem;
	height: 300px;
	background-color: white;
	border-radius: 8px;
	/*水平居中*/
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	padding-left: 12px;
	padding-right: 12px;
	box-shadow: 0 3px 9px #cfcfcf;
	vertical-align:middle;
	text-align:center;
}

input[id="username"],
input[id="password"] {
	font-size: 16px;
	height: 20px;
	margin: 0 auto;
	width: 80%;
    max-width: 20rem;
	border-radius: 4px;
	border: 1px solid rgb(178, 178, 178);
	padding: 10px 3px 10px 36px;
}

#submitBtn {
	width: 95%;
	color: #fff;
	font-size: 0.98rem;
	border-radius: 22px;
	background-color: #5f8cd0;
	border: none;
	height: 2.5rem;
	line-height: 2.5rem;
	margin-bottom: 10px;
}

.input_control {
	width: 100%;
	text-align: center;
	padding-top: 20px;
}

.input_control:nth-child(1) {
	width: 100%;
	text-align: center;
	padding-top: 30px;
}

.input_control:nth-child(3) {
	padding-bottom: 20px;
}
.login_img{
	position: absolute;
	width: 25px;
	height: 25px;
	margin-top: 7px;
	margin-left: 7px
}
a {
	color: #999999;
	font-size: 0.85rem;
	text-decoration: none;
	margin-top: 30px;
}
.register {
	float: left;
	margin-left: 10px;
}
 .forget_pwd{
	 float: right;
	 margin-right: 10px;
}
